But, O LORD of hosts, who judges righteously, who tests the mind and the heart, let me see your vengeance on them: for unto you have I revealed my cause.
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Bede
AD 735
Hence they rightly believed and confessed that as God he knew all things and that as the Son of God He had come from God. It is a clear indication of divinity to know the secret things of another’s thoughts, as Solomon affirmed when he said in supplication to God, “For you alone know the hearts of all the children of human beings.” Hence, Jeremiah too said, “You, O Lord of Sabaoth, are the one who judges righteously and probes the loins and hearts of human beings.” - "Homilies on the Gospels 2.12"
Sabaoth. That is, of hosts or armies; a name frequently given to God, in the Scriptures.
Thy revenge. This was rather a prediction of what was to happen, with an approbation of the divine justice, than an imprecation. (Challoner)
He speaks of the impenitent, (St. Jerome) and wishes they may be converted.